Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hang hang » nang hang, cang thang, hung thang
hach toan » thanh toan, manh toan
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
ca nhung » cua nhung, cam nhung, va nhung
tac toan » tap toan, tam toan, tich toan
hang ca » hang va, nang cao, hang tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - hang hang ca nhung cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - hang hang ca nhung cong ((tac toan) OR (hach toan)) cau*.